Recovery File

I have a Sony VAIO VPCEH15FX, been with me for almost 8 years now. I replaced my HDD a while ago and installed a Windows 7 so I lost my original recovery file from Sony. I don't have any of the drivers or assisst button work anymore, brightness or sound adjusting. My laptop had the windows 7 running but I'm not sure which one was it (home, basic, premium..). Now I want to format my laptop it got so slow. How can I get the original recovery file from sony so that I can reset my laptop to it's factory state.